Ponded crater detail on 433 Eros imaged from 
NEAR Shoemaker on 24 Jan. 2001. Credit: NASA/JHU APL.

There has been a variety of explanations for the sandy "ponds" found on 433 Eros by NASA's NEAR Shoemaker mission, including outgassing and electrostatic transport. One recent paper argues for thermal-stress erosion of boulders caught in depressions. This image is from NEAR Shoemaker on 24 January 2001, credit: NASA/JHU APL.


Contents  on 14 December '10

Resources:

The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. And use the all-up news archive to access news from any time since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.

NEOCP Activity  on 14 December '10

The MPC's NEO Confirmation Page has 12 listings: 3 new, 9 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and nine updated listings. Of these, ten were "one nighters." So far The Tracking News has counted a total of thirteen listings on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 14 December '10

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 14 Dec. '10 >>  MPEC 2010-X110 - "07:09 UT" - Daily Orbit Update

Observers  on 14 December '10

Eighteen observers appear in today's MPEC.

CodeObserver / observatory
160Castelmartini Obs. in Italy, 10 in MPEC 2010-X110 -- 2010 XO10, 2010 XG3, 2010 WP8, 2010 WL, 2010 WJ, 2010 VK188, 2010 TM3, 2010 LR68, 2010 LF86, 2010 JL33
703Catalina Sky Survey (CSS) in Arizona, 16 in MPEC 2010-X110 -- 2010 XZ58, 2010 XD25, 2010 WH, 2010 LF86, 2008 VK14, 2004 BE11, 89355, 36236, 34613, 252091, 21374, 198856, 18882, 17181, 137199, 5496
176Consell Obs. in Spain, 1 in MPEC 2010-X110 -- 2010 XU45
448Desert Moon Obs. in New Mexico, 1 in MPEC 2010-X110 -- 2010 WF3
H20Eastern Illinois Univ. Obs. in Illinois, 12 in MPEC 2010-X110 -- 2010 XC15, 2010 WP8, 2010 TM3, 2010 JL33, 2006 VB14, 2005 GC120, 2004 YZ23, 2003 MJ4, 2002 OS4, 2001 XF1, 1999 XR35, 1997 XS2
I19El Gato Gris Obs. in Argentina, 2 in MPEC 2010-X110 -- 2010 XT45, 2010 VZ
F655David Asher in Northern Ireland via Faulkes Telescope North in Hawaii, 1 in MPEC 2010-X110 -- 2010 SO16
704LINEAR in New Mexico, 10 in MPEC 2010-X110 -- 2010 XG3, 2010 WJ, 2004 YZ23, 2003 MJ4, 86324, 68278, 247156, 153814, 137084, 1580
560Madonna di Dossobuono Obs. in Italy, 3 in MPEC 2010-X110 -- 2010 XO10, 2006 VB14, 2000 AC6
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPEC 2010-X110 -- 2010 XU, 2010 XN
188Majdanak Obs. in Uzbekistan, 1 in MPEC 2010-X110 -- 2006 HZ51
B90Malina River Obs. in Italy, 2 in MPEC 2010-X110 -- 2010 LO97, 2010 JL33
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-X110 -- 2009 FD
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPEC 2010-X110 -- 2010 OC101, 154347, 143651, 8034, 1580
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2010-X110 -- 2010 XJ, 144411
291Spacewatch 1.8m telescope in Arizona, 14 in MPEC 2010-X110 -- 2010 XU, 2010 XO56, 2010 XG25, 2010 XD11, 2010 XC25, 2010 XC11, 2010 XA1, 2010 WZ8, 2010 WH3, 2010 VY71, 2010 OP1, 2010 KH, 2006 DP14, 2001 RP17
D96Tzec Maun Obs. Moorook in South Australia, 1 in MPEC 2010-X110 -- 2006 VB14
C51WISE in Earth polar orbit, 3 in MPEC 2010-X110 -- 2010 LN14, 141851, 141761
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 December '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2010 XA59NEODyS17092021-2084164.04e-09-7.93-8.340NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2010-12-13.449 to 2010-12-13.535."
2010 XW58NEODyS17092014-2086293.83e-06-4.97-5.50NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2010-12-11.475 to 2010-12-13.499."
2010 XO56JPL Sentry17092043-210536.0e-09-5.77-5.930JPL: "Analysis based on 20 observations spanning 1.9130 days (2010-Dec-11.46753 to 2010-Dec-13.38057)." Diameter approximately 0.270 km. from mean, weighted H=20.5.
NEODyS1709R E M O V E D-
2010 XC25JPL Sentry17092024-2093422.5e-05-2.08-2.660JPL: "Analysis based on 34 observations spanning 4.9770 days (2010-Dec-08.37716 to 2010-Dec-13.35418)." Diameter approximately 0.264 km. from mean, weighted H=20.5.
NEODyS17092024-2090522.54e-05-2.08-2.670NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2010-12-08.378 to 2010-12-13.355."
2010 XUNEODyS17092065-206511.0e-10-10.37-10.370NEODyS: "Based on 73 optical observations (of which 0 are rejected as outliers) from 2010-12-01.100 to 2010-12-14.156."
JPL Sentry1709R E M O V E DJPL: Risk listing removed at 1137 UTC.
2010 XNJPL Sentry1709R E M O V E DJPL: Risk listing removed at 1115 UTC.
2009 FDJPL Sentry19082185-219022.5e-03-1.66-1.68-JPL: "Analysis based on 178 observations spanning 650.95 days (2009-Feb-24.36493 to 2010-Dec-07.316529)." Diameter approximately 0.130 km. from mean, weighted H=22.1.
NEODyS17092185-219682.44e-03-1.67-1.69-NEODyS: "Based on 182 optical observations (of which 5 are rejected as outliers) from 2009-02-24.366 to 2010-12-07.317."
2005 TM173JPL Sentry04012011-21061579.3e-07-5.35-6.210JPL: "Analysis based on 6 observations spanning 1.9467 days (2005-Oct-09.20072 to 2005-Oct-11.14743)." Diameter approximately 0.051 km. from mean, weighted H=24.1.

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.

Chronology  on 14 December '10

Times are UTC for when items were noted or added by The Tracking News.

1908Noted that JPL Sentry has updated its 2009 FD risk assessment - see above
1709Noted that NEODyS has updated its 2009 FD risk assessment - see above
Noted that NEODyS has posted 2010 XA59 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 XC25 risk assessment - see above
Noted that NEODyS has updated its 2010 XC25 risk assessment - see above
Noted that JPL Sentry has removed 2010 XN as an impact risk - see above
Noted that JPL Sentry has updated its 2010 XO56 risk assessment - see above
Noted that NEODyS has removed 2010 XO56 as an impact risk - see above
Noted that JPL Sentry has removed 2010 XU as an impact risk - see above
Noted that NEODyS has updated its 2010 XU risk assessment - see above
Noted that NEODyS has posted 2010 XW58 as an impact risk - see above
Grabbed MPEC 2010-X110 - Daily Orbit Update - see above
0401Noted that JPL Sentry has updated its 2005 TM173 risk assessment - see above